Executes JFileChooser activities in Swing Thread

If Minecraft is fullscreen, exit fullscreen when using GuiFileChooser

src/main/java/eu/crushedpixel/replaymod/gui/elements/GuiFileChooser.java

@@ -3,6 +3,7 @@ package eu.crushedpixel.replaymod.gui.elements;
 import eu.crushedpixel.replaymod.gui.elements.listeners.FileChooseListener;
 import lombok.Getter;
 import lombok.Setter;
+import net.minecraft.client.Minecraft;
 
 import javax.swing.*;
 import javax.swing.filechooser.FileNameExtensionFilter;
@@ -12,6 +13,10 @@ import java.util.List;
 
 public class GuiFileChooser extends GuiAdvancedButton {
 
+    private final Minecraft mc = Minecraft.getMinecraft();
+
+    private final JFrame jFrame = new JFrame();
+
     @Getter
     private File selectedFile;
 
@@ -62,10 +67,14 @@ public class GuiFileChooser extends GuiAdvancedButton {
                     e.printStackTrace();
                 }
 
-                JFrame frame = new JFrame();
+                if(mc.isFullScreen()) mc.toggleFullscreen();
 
+                SwingUtilities.invokeLater(new Runnable() {
+                    @Override
+                    public void run() {
                         JFileChooser fileChooser = new JFileChooser();
-                fileChooser.setFileFilter(new FileNameExtensionFilter("Image Files", allowedExtensions));
+
+                        fileChooser.setFileFilter(new FileNameExtensionFilter(null, allowedExtensions));
 
                         if(selectedFile != null) {
                             fileChooser.setCurrentDirectory(selectedFile.getParentFile());
@@ -74,8 +83,8 @@ public class GuiFileChooser extends GuiAdvancedButton {
 
                         fileChooser.setFileSelectionMode(save ? JFileChooser.SAVE_DIALOG : JFileChooser.OPEN_DIALOG);
                         fileChooser.setVisible(true);
-                fileChooser.grabFocus();
-                fileChooser.showOpenDialog(frame);
+                        //fileChooser.grabFocus();
+                        fileChooser.showOpenDialog(jFrame);
 
                         File file = fileChooser.getSelectedFile();
 
@@ -89,8 +98,17 @@ public class GuiFileChooser extends GuiAdvancedButton {
                             }
                         }
 
-                frame.dispose();
+                        fileChooser.invalidate();
+                    }
+                });
+
             }
         }, "replaymod-file-chooser").start();
     }
+
+    @Override
+    protected void finalize() throws Throwable {
+        jFrame.dispose();
+        super.finalize();
+    }
 }